3 years ago

12 is 30% of what number?

Mathematics

1 answer:

Sladkaya [172]3 years ago

4 0

Answer is provided in the image attached.

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The length of the hypotenuse of a right triangle is 137 units. The length of one leg of the triangle is 105. Gina wrote the foll

OLga [1]

A^2 + b^2 = c^2
b^2 = c^2 - a^2
b^2 = 137^2 - 105^2
b^2 = 18769 - 11025
b^2 = 7744
b = sqrt 7744
b = 88

Gina's step is not correct... the length of the unknown leg is not 7744, it is the sqrt of 7744, which is 88

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3 years ago

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The height of an adult male is known to be normally distributed with mean of 175 cm and standard deviation of 6 cm. The 20th per

dusya [7]

Answer:

The height below which 20% of the persons lie equals 169.95 cm

Step-by-step explanation:

Given that

Mean height = 175 cm

Standard deviation = 6 cm

Hence for the given question we need to find the standard variate factor ( Z factor) corresponding to the 20% of the area under the standard normal distribution curve

Using the standard normal distribution tables we have Z factor corresponding to an area of 20% equals ( Z = -0.84166)

Thus we have

$Z=\frac{X-\bar{X }}{\sigma }\\\\\Rightarrow -0.84166=\frac{X-175}{6}\\\\\therefore X=-0.84166\times 6+175\\\\X=169.95cm$

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1. Alexia started babysitting when she was in high school. She has built a reputation for herself and has become popular among t

Alinara [238K]

$10+$5=15
$75/$15=5
Hours = 5

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Find the value of x.<br> 128<br> (6x + 20

DENIUS [597]

What is the 128 for ?

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